/* ================================================================
   武汉乐销科技有限公司 · 官网样式
   主题：深蓝 + 金色（Three.js 3D 动态背景配套）
   ================================================================ */

/* ---------- 变量 ---------- */
:root {
  --navy-950: #05081a;
  --navy-900: #070c22;
  --navy-850: #0a1128;
  --navy-800: #0b1330;
  --navy-700: #12204a;
  --gold-300: #f7df9c;
  --gold-400: #eec66a;
  --gold-500: #e3b94f;
  --gold-600: #c9971c;
  --gold-700: #a97e14;
  --cyan: #58c6f5;
  --text-1: #eef2ff;
  --text-2: rgba(226, 232, 255, 0.66);
  --text-3: rgba(226, 232, 255, 0.45);
  --glass: rgba(15, 25, 58, 0.5);
  --glass-border: rgba(140, 160, 255, 0.12);
  --gold-border: rgba(227, 185, 79, 0.28);
  --radius-lg: 20px;
  --radius-md: 14px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC",
    "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --shadow-gold: 0 10px 40px -12px rgba(227, 185, 79, 0.35);
}

/* ---------- 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--text-1);
  background: var(--navy-950);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  color: inherit;
  cursor: pointer;
}

ul {
  list-style: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

::selection {
  background: rgba(227, 185, 79, 0.35);
  color: #fff;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--navy-950);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #2a3a6e, #1b2750);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--gold-600);
}

/* ---------- 全局背景 ---------- */
.page-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1200px 800px at 78% -10%, rgba(52, 78, 148, 0.28), transparent 60%),
    radial-gradient(1000px 700px at -10% 30%, rgba(30, 44, 96, 0.35), transparent 60%),
    radial-gradient(900px 900px at 50% 120%, rgba(120, 90, 20, 0.18), transparent 60%),
    linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 45%, var(--navy-950) 100%);
}

/* 金色星尘噪点 */
.page-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    radial-gradient(1.5px 1.5px at 20% 30%, rgba(247, 223, 156, 0.6), transparent 100%),
    radial-gradient(1px 1px at 40% 70%, rgba(247, 223, 156, 0.4), transparent 100%),
    radial-gradient(1.5px 1.5px at 60% 20%, rgba(255, 255, 255, 0.35), transparent 100%),
    radial-gradient(1px 1px at 80% 55%, rgba(247, 223, 156, 0.5), transparent 100%),
    radial-gradient(1.5px 1.5px at 90% 85%, rgba(255, 255, 255, 0.3), transparent 100%);
}

/* ---------- 布局容器 ---------- */
.container {
  width: min(1160px, 92%);
  margin-inline: auto;
}

/* ================================================================
   导航栏
   ================================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(6, 10, 26, 0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: rgba(140, 160, 255, 0.1);
  box-shadow: 0 8px 30px -18px rgba(0, 0, 0, 0.8);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  border-radius: 50%;
  box-shadow: 0 0 0 1px rgba(227, 185, 79, 0.35), 0 6px 20px -6px rgba(227, 185, 79, 0.5);
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 2px;
  background: linear-gradient(120deg, var(--gold-300), var(--gold-500) 60%, var(--gold-600));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-inline: auto;
}

.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text-2);
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold-400), var(--gold-600));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s ease;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--gold-300);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-burger span {
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-1);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-burger.is-open span:nth-child(2) {
  opacity: 0;
}
.nav-burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease,
    background 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}

.btn-gold {
  color: #171004;
  background: linear-gradient(120deg, var(--gold-300), var(--gold-500) 55%, var(--gold-600));
  box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 44px -10px rgba(227, 185, 79, 0.55);
}

.btn-ghost {
  color: var(--gold-300);
  border: 1px solid rgba(227, 185, 79, 0.45);
  background: rgba(227, 185, 79, 0.06);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--gold-400);
  background: rgba(227, 185, 79, 0.14);
  box-shadow: 0 10px 30px -14px rgba(227, 185, 79, 0.5);
}

.btn-outline {
  color: var(--gold-300);
  border: 1px solid var(--gold-border);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--gold-400);
  background: rgba(227, 185, 79, 0.1);
  transform: translateY(-2px);
}

.btn-block {
  width: 100%;
  margin-top: 6px;
}

/* 开发中/敬请期待：不可点击占位 */
.btn.is-disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
  transform: none !important;
  box-shadow: none !important;
}

/* ================================================================
   Hero
   ================================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-scene {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-scene canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* 顶部压暗 + 底部渐隐，衔接下一节 */
.hero-vignette {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(5, 8, 26, 0.75) 0%, rgba(5, 8, 26, 0) 28%),
    radial-gradient(120% 90% at 50% 45%, transparent 45%, rgba(5, 8, 26, 0.55) 100%),
    linear-gradient(180deg, transparent 62%, rgba(5, 8, 26, 0.92) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 120px 0 80px;
  animation: heroIn 1s ease both;
}

@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 18px;
  margin-bottom: 26px;
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--gold-300);
  border: 1px solid rgba(227, 185, 79, 0.35);
  border-radius: 999px;
  background: rgba(227, 185, 79, 0.07);
}

.hero-eyebrow::before,
.hero-eyebrow::after {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold-500);
}

.hero-title {
  font-size: clamp(38px, 6vw, 66px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 2px;
  text-shadow: 0 6px 40px rgba(0, 0, 0, 0.55);
}

.hero-title-gold {
  background: linear-gradient(120deg, #f9e6ae, var(--gold-500) 55%, var(--gold-600));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-sub {
  margin-top: 22px;
  font-size: clamp(15px, 2vw, 18px);
  color: var(--text-2);
  letter-spacing: 1px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 38px;
}

.hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
  font-size: 13px;
  color: var(--text-3);
}

.hero-trust i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold-500);
}

/* 滚动指示 */
.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  z-index: 2;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-3);
  font-size: 12px;
  letter-spacing: 2px;
}

.hero-scroll-mouse {
  width: 22px;
  height: 36px;
  border: 1.5px solid rgba(227, 185, 79, 0.45);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}

.hero-scroll-dot {
  width: 3px;
  height: 8px;
  border-radius: 3px;
  background: var(--gold-400);
  animation: scrollDot 1.6s ease-in-out infinite;
}

@keyframes scrollDot {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  70% {
    transform: translateY(12px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 0;
  }
}

/* ================================================================
   通用 Section
   ================================================================ */
.section {
  position: relative;
  padding: 96px 0;
  scroll-margin-top: 64px;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-eyebrow {
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--gold-500);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.section-title {
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 800;
  letter-spacing: 1px;
}

.section-desc {
  margin-top: 14px;
  color: var(--text-2);
  font-size: 15px;
}

/* ================================================================
   产品中心
   ================================================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.product-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: linear-gradient(180deg, rgba(19, 30, 66, 0.62), rgba(10, 16, 40, 0.5));
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold-border);
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(227, 185, 79, 0.12);
}

.product-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 190px;
  position: relative;
}

.product-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(60% 70% at 50% 40%, rgba(227, 185, 79, 0.16), transparent 70%);
  opacity: 0.7;
  transition: opacity 0.35s ease;
}

.product-visual-store::before {
  background: radial-gradient(60% 70% at 50% 40%, rgba(88, 198, 245, 0.14), transparent 70%);
}

.product-card:hover .product-visual::before {
  opacity: 1;
}

.product-visual svg {
  position: relative;
  z-index: 1;
  animation: floaty 5s ease-in-out infinite;
}

.product-visual-store svg {
  animation-delay: 1.2s;
}

@keyframes floaty {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-9px);
  }
}

.product-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 6px 30px 30px;
  flex: 1;
}

.product-tag {
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--gold-300);
  background: rgba(227, 185, 79, 0.12);
  border: 1px solid rgba(227, 185, 79, 0.3);
}

.product-tag-cyan {
  color: var(--cyan);
  background: rgba(88, 198, 245, 0.1);
  border-color: rgba(88, 198, 245, 0.28);
}

.product-name {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 1px;
}

.product-desc {
  color: var(--text-2);
  font-size: 14.5px;
}

.product-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 14px;
  margin-top: 4px;
}

.product-points li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  color: var(--text-2);
}

.product-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  width: 9px;
  height: 5px;
  border-left: 2px solid var(--gold-500);
  border-bottom: 2px solid var(--gold-500);
  transform: rotate(-45deg);
}

/* ================================================================
   核心能力
   ================================================================ */
.caps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.cap-card {
  padding: 28px 26px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: rgba(13, 21, 50, 0.45);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.cap-card:hover {
  transform: translateY(-5px);
  border-color: var(--gold-border);
  background: rgba(18, 29, 66, 0.6);
}

.cap-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  margin-bottom: 18px;
  color: var(--gold-400);
  background: linear-gradient(140deg, rgba(227, 185, 79, 0.16), rgba(227, 185, 79, 0.05));
  border: 1px solid rgba(227, 185, 79, 0.25);
  box-shadow: inset 0 0 18px rgba(227, 185, 79, 0.06);
}

.cap-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.cap-card p {
  font-size: 13.5px;
  color: var(--text-2);
}

/* ================================================================
   关于我们
   ================================================================ */
#about {
  border-top: 1px solid rgba(140, 160, 255, 0.07);
  border-bottom: 1px solid rgba(140, 160, 255, 0.07);
}

.about-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.about-text .section-title {
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-2);
  font-size: 15px;
  margin-bottom: 14px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 34px;
}

.stat {
  padding: 18px 10px;
  text-align: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: rgba(13, 21, 50, 0.45);
}

.stat-num {
  display: block;
  font-size: 26px;
  font-weight: 800;
  background: linear-gradient(120deg, var(--gold-300), var(--gold-600));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-3);
}

/* 设备形态插画 */
.about-visual {
  position: relative;
  min-height: 380px;
}

.device-device {
  position: absolute;
  border-radius: 16px;
  border: 1px solid rgba(140, 160, 255, 0.16);
  background: linear-gradient(180deg, rgba(22, 34, 76, 0.72), rgba(10, 16, 40, 0.66));
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  box-shadow: 0 30px 60px -24px rgba(0, 0, 0, 0.75), inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.device-main {
  top: 40px;
  left: 12%;
  width: 76%;
  height: 250px;
  padding: 14px;
  border-radius: 18px;
}

.device-phone {
  right: 6%;
  bottom: -10px;
  width: 150px;
  height: 240px;
  border-radius: 22px;
  padding: 10px;
  animation: floaty 6s ease-in-out infinite;
}

.device-screen {
  width: 100%;
  height: 100%;
  border-radius: 10px;
  background: linear-gradient(160deg, rgba(227, 185, 79, 0.08), rgba(88, 198, 245, 0.05));
  border: 1px solid rgba(140, 160, 255, 0.1);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.device-phone .device-screen {
  padding: 12px 10px;
  gap: 8px;
}

.device-line {
  height: 8px;
  border-radius: 6px;
  background: linear-gradient(90deg, rgba(227, 185, 79, 0.5), rgba(227, 185, 79, 0.14));
}

.device-line-2 {
  width: 72%;
  background: linear-gradient(90deg, rgba(88, 198, 245, 0.45), rgba(88, 198, 245, 0.12));
}

.device-line-3 {
  width: 88%;
}

/* ================================================================
   联系我们
   ================================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.contact-card {
  padding: 30px 26px;
  text-align: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: rgba(13, 21, 50, 0.45);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.contact-card:hover {
  transform: translateY(-5px);
  border-color: var(--gold-border);
}

.contact-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--gold-400);
  background: radial-gradient(circle at 30% 30%, rgba(227, 185, 79, 0.22), rgba(227, 185, 79, 0.06));
  border: 1px solid rgba(227, 185, 79, 0.3);
}

.contact-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.contact-card p {
  font-size: 14px;
  color: var(--text-2);
  word-break: break-all;
}

/* ================================================================
   页脚
   ================================================================ */
.site-footer {
  border-top: 1px solid rgba(140, 160, 255, 0.1);
  background: rgba(4, 7, 20, 0.6);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  padding: 52px 0 36px;
}

.footer-brand .brand-name {
  font-size: 17px;
}

.footer-brand p {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--text-3);
}

.footer-links {
  display: flex;
  gap: 56px;
}

.footer-col h4 {
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--gold-400);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  margin-bottom: 10px;
  font-size: 13.5px;
  color: var(--text-2);
  transition: color 0.25s ease;
}

.footer-col a:hover {
  color: var(--gold-300);
}

/* 页脚「敬请期待」占位（开发中产品，暂不可点击） */
.footer-coming {
  display: block;
  margin-bottom: 10px;
  font-size: 13.5px;
  color: var(--text-3);
  cursor: default;
}

.footer-bottom {
  border-top: 1px solid rgba(140, 160, 255, 0.08);
  padding: 18px 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-3);
}

/* ================================================================
   回到顶部
   ================================================================ */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  z-index: 90;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--gold-300);
  background: rgba(16, 25, 58, 0.85);
  border: 1px solid var(--gold-border);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background 0.3s ease;
}

.back-top.is-show {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-top:hover {
  background: rgba(30, 44, 96, 0.95);
}

/* ================================================================
   滚动入场动画（IntersectionObserver 驱动）
   ================================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: calc(var(--delay, 0) * 0.12s);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-content {
    animation: none;
  }
}

/* ================================================================
   响应式
   ================================================================ */
@media (max-width: 960px) {
  .products-grid,
  .caps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }

  .about-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-visual {
    min-height: 320px;
    max-width: 520px;
    margin-inline: auto;
    width: 100%;
  }
}

@media (max-width: 720px) {
  .section {
    padding: 72px 0;
  }

  /* 移动端导航 */
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 6vw 22px;
    background: rgba(6, 10, 26, 0.96);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(140, 160, 255, 0.1);
    transform: translateY(-16px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  }

  .nav-links.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-link {
    padding: 14px 8px;
    font-size: 16px;
    border-bottom: 1px solid rgba(140, 160, 255, 0.06);
  }

  .nav-link::after {
    display: none;
  }

  .nav-burger {
    display: flex;
  }

  .nav-actions .btn-sm {
    display: none;
  }

  .hide-sm {
    display: none;
  }

  .products-grid,
  .caps-grid {
    grid-template-columns: 1fr;
  }

  .product-points {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    flex-direction: column;
    gap: 28px;
  }

  .footer-links {
    gap: 32px;
    flex-wrap: wrap;
  }

  .hero {
    min-height: 100svh;
  }

  .hero-content {
    padding-top: 110px;
  }

  .back-top {
    right: 16px;
    bottom: 20px;
  }
}